paranasal sinus par·a·na·sal sinus (pār’ə-nā’zəl) n. Any of the paired cavities, designated frontal, sphenoidal, maxillary, and ethmoidal, located in the bones of the face and lined by a mucous membrane continuous with that of the nasal cavity.

paraneoplasia par·a·ne·o·pla·sia (pār’ə-nē’ō-plā’zhə, -zhē-ə) n. Hormonal, neurological, hematological, and other clinical and biochemical disturbances associated with malignant neoplasms but not directly related to invasion by the primary tumor or its metastases. par’a·ne’o·plas’tic (-plās’tĭk) adj.

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